#include <Eigen/Core>
#include <iostream>

using namespace Eigen;
using namespace std;

int
main(void)
{
	int const N = 5;
	MatrixXi A(N, N);
	A.setRandom();
	cout << "A =\n" << A << '\n' << endl;
	cout << "A(1..3,:) =\n" << A.middleCols(1, 3) << endl;
	return 0;
}
